Surname Theerathad (Theerathad 
) , across the world, is an extremely rare last name. The family name Theerathad is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More prevalently, Theerathad is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Theerathad | Thailand |
Niamglum, Hemajiroj, and Sakwarathorn